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check Convergence by decreasing mesh size and time steps
Posted Jun 25, 2020, 12:25 a.m. EDT 1 Reply
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There is a ready example in Comsol for capillary tube levelset. I wanted to check convergency of result by decreasing the mesh size to see if the final bulk velocity will converge to some value... I also, did consider decreasing time steps to keep CFL condition valid. But, the problem is as I decreas mesh size the flow velocity decreas continously and does not converge to any number! I really appreciate it if someone tell me if I am doing some thing wrong in checking convergency? Best, Hojjat
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Hi Hojjat,
Without seeing your model it's difficult to tell if you indeed have a CV problem or if you should just keep on decreasing the mesh size until the solution is stable.
Have you tried following the tips of this knowledge base entry? : https://www.comsol.com/support/knowledgebase/1261